Thanks for your question on Healthcare Magic.
I can understand your concern.
In my opinion, your all symptoms are related to stress and anxiety.
At your age of 48 years, chances of
menopause is more.
During this period, females tend to have
hormonal changes like low estrogen,
progesterone etc.
And these hormonal changes can cause mood swings, stress, anxiety etc.
And all these can cause
rapid heart rate, burping etc.
So better to consult gynecologist and get done hormone levels.
You may need
hormone replacement therapy (HRT) and anxiolytic drugs.
Don't worry, you will be alright.
Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.